Aligning jig for piston and connecting rod assemblage



Nov. 4 1924. 1,513,951

w. w. ADAMS ALIGNING JIG FOR PISTON AND CONNECTING ROD ASSEMBLAGE Filed May 22 I922 y WWINVENTOR ATTORNEY Patented Nov. 4, 1924:.

UNETETD STATE WALTER W. ADAMS, 6F FORT WAYNE, INDIANA.

ALIGNING $16" FOR PIETON AND Application filed May 22,

To all whom it may concern:

Be it known that 1, Emma W. ADAMS, a citizen of the United States of America, and resident of Fort Wayne, in the county of Allen and State of Indiana, have invented certain new and useful, Improvements in Aligning Jigs for Piston and Con necting Rod Asseml ilage, of which the following is specification.

This invention relates to improvements in aligning jigs for piston and connecting rod assemblages, and the object thereof is the provision of a jig so constructed to facilitate detection and the correction of faulty alinements in the bearings of connecting rods and with their pistons, and also to provide a construction equally applicable to piston rods varying considerable in dimensions. A further object is to afford, in connection with the jig, a straightening means for connecting rods.

The above objects are accomplished by the construction illustrated in the accompanying drawings in which Figure 1 is a side elevation of a embodying the invention;

Fig. 2 is a front elevation projected from Fig. 1;

Fig. 3 is a plan view of the jig, a portion being broken away, including also a connecting rod positioned thereon; and

Fig. 4 is a detail view of the connecting rod rest positioned for connecting rods of large size, the view showing also one endof the connecting rod mounted thereon.

The characters appearing in the description refer to parts shown in the drawings and designated thereon by corresponding characters.

The invention comprises a standard 1 havin a hollow base 2,, on the bottom of which. is a lug 3 adapted to be held between the jaws of a vise (not shown) so the standard may thus be rigidly supported. The front face at of the standard is dressed so as to present a true vertical plane, and the front face 5 of the base 2 is also dressed and presents a true vertical plane parallel with the face 4, there being an offset 6 in the standard between the two faces. The upper portion of the standard has a vertical elongated slot 7 extending therethrough, and the base has at one side thereof a pair of integral jaws 8 and 9 spaced apart and horizontally disposed. The jaw 8 has upon its upper face a pair of ribs 10, and the jaw 9 CONNECTING- BOD ASSEMIBLAGE.

1922'. Serial No. 562,614.

has a screw 11 threaded therein that extends vcrtically in a plane midway between the ribs.

A rest 12, the inner end of which has a fiat foot 13, is adjust-ably positioned with its foot bearing against the face 5 of the base, there being a screw 1% extending horizontally through the base into the rest adapted when tightened to draw the rest firmly against the face 5 of the base so as to be held rigidly in horizontal position. The rest is rectangular in cross section and has at each of its corners a rounded bead 15, 16, 17 and 18 respectively, and the sides 19 of the rest are wider than the other two faces 20, and the beads are therefore spaced apart accordingly.

A gage member 21, the inner end of which has a fiat foot 22, is adjustably positioned with its foot bearing against the face 4 of the standard, there being a screw 23 extending horizontally through the slot 7 into the gage member, adapted when tightened to draw the member firmly against the face 4 of the standard so as to be held rigidly in horizontal position. The gage member has three integral collars 24, 25 and 26 respectively which are spaced apart. The collars are precisely of the same diameter, and the collar 25 has on one side thereof a void 27 made therein for the purpose hereinafter set forth,

In utilizing the invention the standard is mounted in a vertical position in a vise by clamping the lug 8 between the jaws thereof, and the connecting rod 28 to be tr'ued is placed with its bearing section 29 of its lower end set squarely upon the uppermost pair of beads of the rest. hen connecting rods of the smaller sizes are applied,

the rest is adjusted to the position shown in Fig. 2 so that the uppermost pair of beads are sufficiently close as to accommodate the bearing of the connecting rod when placed thereon, and when the larger sizes of connecting rods are applied, the rest is adjusted to the position shown in Fig. 4- so that the uppermost pair of beads are spaced sufliciently apart to suit the bearing of the connecting rod.

The gage member is then adjusted vertically to a position on the standard so that the wrist pin 30 in the head 31 of the connecting rod may be brought into contact with the projecting faces of the collars on the gage member by turning the connecting rod on the rest. When the head 31 of the con ill) necting rod is too wide to be received between the collars 24 and 25, the gagememher is turned so that its void, previously referred to, will afford clearance for the head between the collars 24- and 26. While the bearing of the connecting rod is resting upon the beads the projecting portions of the wrist pin should bear evenly against the corresponding collars when the connecting rod is properly trued, and their failure to do so will be apparent, which will enable the operator to determine the extent the rod should be bent so that its wrist pin and hearing may be alined.

lVhen a connecting rod is assembled with its piston (not shown), by placing its bearing upon the rest and sliding it toward the base until the piston bears against the face 4; of the standard, the parallelism of the side of the piston with the adjacent face at of the standard is indicative of the alinement of the piston with the connecting rod.

Connecting rods, when found to be out of alinement, are inserted between the jaws upon the ribs 10 and are bent by applying the screw 11. Or, the connecting rods may be held on the ribs by tightening the screw and then twisted by applying a wrench in the usual manner while thus held. These operations are carried out until the connecting rods are found to be in alinement.

What I claim is 1. In an aligning jig for connecting rods,- a standard; a rest extending from the stand ard for supporting connection with one bearing of a connecting rod, and a gauge member extending from the standard and. having gauge collars of equal diameter and spaced apart in axial alinement with each other and operable to bear respectively against the corresponding projecting ends of the wrist-pin in the opposite end of the connecting rod when said wrist-pin and the bearing in the other end of the connecting" rod are alined in a common plane.

2. An aligning jig for piston and connectingrod assemblages, a standard having flat gage face and a base, the front face of which is flat and parallel with the gage face, there being an offset between said faces; a rest having a fiat foot that bears againstthe front face of the base, and having also a series of differently spaced beads extending at right angles relative to said flat faces, and being adapted to be adjustably turned and held so that the beads may be positioned uppermost selectively in differently spaced pairs; and a gage member adjustably positioned against the face of the standard and having three alined gage collars spaced apart, the intervening co].- lar having a clearance void therein.

3. In an. aligning jig of the class described, a standard having a flat gage face; a rest having a flat foot that bears against said flat face and having also a series of differently spaced beads extending at right angles to said face, and being adapted to be adjustably turned and held so that the beads may be positioned uppermost selec tively in differently spaced pairs; and a gage member having a flat foot that bears against said face and having alined gage collars spaced apart.

4. In an aligning jig of the class de scribed, a gage means including a support therefor, and a rest adapted to be adjustably positioned relative tothe gage means and having a series of differently spaced beads and being adapted to be turned and held so that the beads may be set in operative position selectively in differently spaced pairs.

5. In an aligning jig for piston and connecting rod assemblages, a rest including support therefor, and a gage member adjustably supported in relation tothe rest, and having three alined gage collars spaced apart, the intervening collar having a clearance void therein adapted to be brought into operative position by adjustably turning the gage member.

In testimony whereof I affix my signature in presence of two witnesses.

WALTER W'. ADAMS.

Witnesses:

MATILDA METTLER, WALTER G. BURNS. 

